Fountain pen



, r;zrIf!///l////////// ///////////////l/lI J. B. FRIEDMAN.

FOUNTAIN PEN. APPLICATION FILED FEB. I5, 1921.

Patented Apr. 18, 1922 UlTED STATES PATNT OFFICE.

FOUNTAIN PEN.

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Specification of Letters Patent.

Patented Apr. 18, 1922.

Application filed. February 15, 1921. Serial No. 445360 To all whom itmay concern:

Be it known that I, JOSEPH B. FRIEDMAN, a citizen of the United States,residing in the city and county of San Francisco and State ofCalifornia, have invented a new and useful Improvement in a FountainPen, of which the following is a specification.

My invention relates to improvements in fountain pens wherein a portionof the ink reservoir is rendered visible to indicate th amount of inksupply therein.

The primary object of the present invention is to provide a new andimproved fountain pen having means for rendering visible the amount ofink supply within said en. p A further object of the invention is toprovide self-filling pens with means for rendering visible the inksupply within said pen.

A still further object of the present invention is to provide new andimproved means for rendering visible the ink supply within said pen.

I accomplish these several objects by means of the device disclosed inthe drawings forming a part of the present specification wherein likecharacters of reference are used to designate similar parts throughoutthe said specification and drawings, and in which Fig. 1 is an elevationof a fountain pen, partly in section, disclosing the preferred form ofthe invention, as applied to a fountain pen of the self-filling type;

Fig. 2 is an enlarged broken sectional view disclosing the constructionand arrangement of the parts in the type of pen disclosed in Fig. l ofthe drawings; and

Figs. 3 and at are enlarged broken sectional views disclosing stillfurther modifications of the invention.

Fig. 5 is a further modified form of the invention.

Referring to the drawings the numeral 1 is used to designate in generalthe barrel of a fountain pen of the self-filling type having atransparent cap 2 screwed or otherwise suitably connected to the endthereof.

A collapsible reservoir 3 is mounted with in the barrel 1 in the usualmanner and is provided with a transparent portion 4 which extends intothe cap 2 of the barrel 1 so that a portion of said reservoir 3 isrendered visible whereby the quantity or amount of the ink supply withinsaid reservoir 3 may be determined.

By holding the pen 1 with the cap 2 lowermost any ink remaining withinthe reservoir 3 will be visible and when no ink is contained therein thereservoir cap 4 will appear transparent, thus indicating the absence ofink within said reservoir 3.

The transparent cap 4. of the reservoir 3 may be mounted within aseparate transparent cap 2 on the end of. the barrel 1, as disclosed inFigs. 1 and 2 of the drawings; or said caps 2 and 4 may be combined in asingle transparent cap 7 which is attached to both the reservoir 3 andbarrel 1 as disclosed in Fig. 3, or an opaque cap 8, having openings orslots 9, through which the transparent reservoir cap 4 may be renderedvisible, may be employed as disclosed in Fig. 4 of the drawings.

Fig. 5 is a further modification of a simple form of the invention asapplied to a fountain pen of the self-filling type and is similar inconstruction to the form disclosed in Fig. 1 with the exception that aslot 14 is provided in the lower end of the barrel in place of thetransparent cap 2 through which slot the ink supply may be renderedvisible.

It is obvious that any one of the forms of the invention disclosed willreadily indicate the amount of ink supply contained within the fountainpen by the simple expedient of holding the pen vertically to permit anyink contained to flow to the bottom or transparent portions of the pen.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination with a fountain pen having a barrel portion, of acollapsible ink reservoir within said barrel; a transparent memberconnected to said reservoir and forming a part thereof to render visiblethe interior of said reservoir; and a tip formed upon the barrel portionadjacent the transparent member arranged to permit observation of theink supply within the reservoir.

2. The combination with a fountain pen of a collapsible ink reservoirtherein, having a portion of said reservoir transparent to rendervisible a portion of the ink in said reservoir.

3. The combination with a fountain pen of a collapsible ink reservoirtherein; a transparent member connected to said reservoir to rendervisible the interior of said reservoir; and a ca mounted upon said penand adjacent the visible portion of said reservoir andvarranged toexpose to view said upon the pen and adjacent said visible porvisibleportion whereby the amount of ink tion to expose to view said visibleportion 10 therein may be determined. whereby the amount of the inksupply in 4. The combination with a fountain pen said reservoir may bedetermined.

of a collapsible ink reservoir therein; a In witness whereof I havehereunto set my transparent member connected to said resersignature.

voir to render visible the interior of said reservoir; and atransparentcap mounted JOSEPH B. FRIEDMAN.

